Daily Report for 11th June 2012

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 10.2 °C (-1.5) 23:37 10.4 °C (-1.0) 16.8 °C (+5.1), 2021 8.3 °C (-3.4), 2011
Maximum Temperature 12.9 °C (-7.8) 13:32 16.7 °C (-3.5) 31.3 °C (+10.6), 2023 12.9 °C (-7.8), 2012
Mean Temperature 11.7 °C (-4.6) 13.3 °C (-2.3) 23.1 °C, 2023 11.7 °C, 2012
Minimum Humidity 93% 00:17 60% 93%, 2012 34%, 2011
Maximum Humidity 98% 16:30 93% 98%, 2012 83%, 2014
Mean Humidity 97% 79% 97%, 2012 58%, 2014
Minimum Pressure 1001 hPa 12:53 1004 hPa 1022 hPa, 2014 1001 hPa, 2012
Maximum Pressure 1003 hPa 11:53 1011 hPa 1028 hPa, 2014 1003 hPa, 2012
Mean Pressure 1002 hPa 1007 hPa 1026 hPa, 2014 1002 hPa, 2012
Mean Wind Speed 5.6 mph (+1.2) 6.1 mph (+1.7) 8.0 mph, 2017 1.3 mph, 2016
Maximum Wind Speed 10.5 mph 14.2 mph 17.3 mph, 2017 8.5 mph, 2016
Maximum Gust 15.4 mph 19:41 20.5 mph 25.3 mph, 2020 12.6 mph, 2016
Mean Wind Direction NE
Rainfall 25.7 mm 86.6 mm (503%) 25.7 mm, 2012
Maximum Hourly Rain 3.2 mm 04:32 3.2 mm, 2012
Maximum 10-min Rain 1.2 mm 03:48 1.2 mm, 2012
Maximum Rain Rate 8 mm/h 03:49 16 mm/h, 2009
Minimum Dew Point 9.9 °C 23:37 6.5 °C 14.6 °C, 2021 1.9 °C, 2011
Maximum Dew Point 12.6 °C 13:32 11.6 °C 18.5 °C, 2023 9.7 °C, 2011
Mean Dew Point 11.2 °C 9.3 °C 15.3 °C, 2021 6.1 °C, 2011
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 11.6 °C * 07:00 10.7 °C 17.0 °C, 2017 8.3 °C, 2011
Day Maximum (09-21) 12.9 °C 13:32 16.6 °C 31.3 °C, 2023 12.9 °C, 2012
Max 10m Temp Rise 0.2 °C 12:26 0.6 °C 1.0 °C, 2020 0.2 °C, 2012
Max 1hr Temp Rise 0.5 °C 12:37 1.9 °C 3.2 °C, 2018 0.5 °C, 2012
Max 1hr Hum Rise 1% 01:01 10% 20%, 2023 1%, 2012
Max 10m Temp Fall 0.1 °C 01:31 0.5 °C 0.9 °C, 2023 0.1 °C, 2012
Max 1hr Temp Fall 0.6 °C 17:39 1.5 °C 3.2 °C, 2023 0.6 °C, 2012
Max 1hr Hum Fall 1% 16:13 11% 19%, 2017 1%, 2012
Max 10m Wind Speed 7.4 mph 16:13 9.8 mph 13.4 mph, 2017 6.1 mph, 2016
Minimum Feels-like 11.4 °C 23:36 10.4 °C 20.5 °C, 2021 6.0 °C, 2011
Maximum Feels-like 15.5 °C 13:30 17.9 °C 36.3 °C, 2023 15.5 °C, 2012
Mean Feels-like 13.5 °C 14.4 °C 27.3 °C, 2023 12.9 °C, 2011
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 2.7 °C (-6.3) 6.3 °C (-2.5) 16.6 °C (+7.6), 2023 2.7 °C (-6.3), 2012
Humidity Range 5% 33% 59%, 2011 5%, 2012
Pressure Range 2 hPa 7 hPa 12 hPa, 2009 1 hPa, 2016
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]23 hrs (32%) [14%] 14.4 [96%], 2015 0 [0%], 2012
Wet Hours 21
[Mean rain rate: 1.2 mm/h]		78 hrs (571%) [29%] 21, 2012 0, 2010
Cloud Cover Overcast
Events None
Comments -11 Moderate Rain, -00 Slight-Moderate broken Rain/Drizzle/Showers (excl 15-18)
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 11th June 2012.
Times of extremes are computed using the midpoint of the longest continuous period at that extreme value.
Cumulative anomalies are reported according to the expected value for the month-to-date rather than month-end.
Sun hrs are derived based on analysis of webcam observations, but may use data from our closest site, Heathrow, when needed.
Wet hrs are dervied algorithmically from rainfall data, though may be adjusted manually.
Rainfall totals may be manually adjusted after the fact to correct delayed or erroneous data.
Cloud cover and Events are manually reported, often with multi-week delays.
Data is generally reliable and accurate but should always be viewed with some quantity of salt to hand.
View monthly summary

Daily Graph of Conditions

day graph

Webcam Summary of Cloud Conditions

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Wind rose